Structural, electrical transport and magnetic properties of the Co-doped La0.5Sr0.5TiO3 at high temperatures

P. T. Qiao, Z. H. Zhao, Y. G. Zhao, X. P. Zhang, W. Y. Zhang, S. B. Ogale, S. R. Shinde, T. Venkatesan, S. E. Lofland, C. Lanci

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12 Scopus citations

Abstract

The temperature dependence of the structural, electrical transport and magnetic properties of La0.5Sr0.5Ti0.93Co 0.07O3+δ thin films above room temperature have been studied. It is found that the structure of La0.5Sr 0.5Ti0.93Co0.07O3+δ samples changes at high temperatures. Correspondingly, the resistivity of the samples increases dramatically and the ferromagnetism of the samples disappears. We demonstrated that this transition is related to the oxygen absorption induced structural distortion, which results in the localization of carriers. This work indicates that carrier-mediated coupling between magnetic ions is essential for ferromagnetism in this system.

Original languageEnglish (US)
Pages (from-to)8-11
Number of pages4
JournalThin Solid Films
Volume468
Issue number1-2
DOIs
StatePublished - Dec 1 2004

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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